Cellular and Biochemical Aspects of Fat Deposition in the Broiler Chicken
1984; Taylor & Francis; Volume: 40; Issue: 2 Linguagem: Inglês
10.1079/wps19840014
ISSN1743-4777
Autores Tópico(s)Antioxidant Activity and Oxidative Stress
ResumoSummaryExcessive adiposity is often a problem in modern broiler chickens by 8 to 10 weeks of age. After hatching, growth of adipose tissue in the chicken is due to both adipose cell hyperplasia and hypertrophy. In the broiler chicken hyperplasia ceases at approximately 14 weeks of age and further accumulation of fat is due solely to filling of existing adipose cells with lipid. Although differences in adipose cell number occur in birds in response to growth rate, degree of fatness is more closely related to adipose cell volume.Rates of fatty acid synthesis in avian liver alter during growth and respond to physiological and nutritional conditions which may be imposed on the bird. Nutritional status and availability of substrate are important in regulating fatty acid synthesis. When chickens were selected over eight generations for increased food consumption, increased body weight gain, decreased food conversion ratio or at random there were significant differences in lipogenesis and lipogenic enzyme activities among groups. Although there were differences in correlated responses in lipogenesis in the four lines, they could not be attributed to differences in food consumption or growth rate of the chickens.
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